Car comparison

BMW 4 Series Gran Coupe (G26) 420ivsBMW X4 (G02 LCI) · Facelift 2021 20i

Compare specs, acceleration, fuel consumption, dimensions, practicality, and estimated running costs side by side.

New comparison

BMW 4 Series Gran Coupe (G26)

420i

184 hp1998 ccGasolineRWDAutomaticTurbochargedCoupe2021-2024

BMW X4 (G02 LCI) · Facelift 2021

20i

184 hp1998 ccGasolineAWDAutomaticTurbocharged2021-2025

Comparison overview

Use the estimates as comparison hints and verify exact figures before making decisions.

BMW 4 Series Gran Coupe (G26) 420i

Quickest 0-100 km/h
7.9 s
Fastest top speed
235 km/h
146 mph
Most powerful
184 hp
137 kW
Highest torque
300 Nm
221 lb-ft
Lightest
1,620 kg
3,571 lb
Best power-to-weight
114 hp/t
85 kW/t
8.8 kg/hp
Lowest combined fuel consumption
7.3 L/100 km
32.2 mpg US
38.7 mpg UK
Best estimated range
808 km
502 mi
Best overall score
55/100
Best performance score
49/100
Best economy score
87/100

BMW X4 (G02 LCI) Facelift 2021 20i

Largest trunk
525 L
Best practicality score
76/100

Specification comparison

Specification comparison
Model	BMW4 Series Gran Coupe (G26)420i	BMWX4 (G02 LCI)Facelift 202120i
Power	184hp137kW	184hp137kW
Torque	300Nm221lb-ft	300Nm221lb-ft
Curb weight	1,620kg3,571lb	1,800kg3,968lb
Gross weight	2,175kg4,795lb	2,420kg5,335lb
Top speed	235 km/h 146 mph	215 km/h 134 mph
To 99% top speed	99.3s99% target: 233 km/h / 145 mph Calculated	102.7s99% target: 213 km/h / 132 mph Calculated
0-100 km/h	7.9s	8.4s
0-200 km/h	34.6s Calculated	51.7s Calculated
0-60 mph	7.5s Calculated	7.9s Calculated
Fuel consumption	7.3L/100 km32.2mpg US38.7mpg UK	8.4L/100 km28mpg US33.6mpg UK
Quarter mile	15.7s Calculated	16.1s Calculated
Power-to-weight	114hp/t85kW/t52hp/1000 lb Calculated	102hp/t76kW/t46hp/1000 lb Calculated
Torque-to-weight	185Nm/t124lb-ft/ton Calculated	167Nm/t112lb-ft/ton Calculated
Estimated range	808km502mi Calculated	774km481mi Calculated
Displacement	1,998cc122cu in	1,998cc122cu in
Length	4,783mm188in	4,751mm187in
Width	1,852mm73in	1,918mm76in
Height	1,442mm57in	1,621mm64in
Wheelbase	2,856mm112in	2,864mm113in
Front track	1,595mm63in	1,620mm64in
Rear track	1,623mm64in	1,666mm66in
Ground clearance	140mm6in	204mm8in
Trunk volume	470L	525L
Max trunk volume	1,290L	1,430L
Doors	5	5
Seats	5	5
Fuel tank	59L	65L

Performance charts

Use the estimates as comparison hints and verify exact figures before making decisions.

Dyno simulation

Estimated stock-style power and torque curves by engine speed.

BMW 4 Series Gran Coupe (G26) 420iBMW X4 (G02 LCI) Facelift 2021 20iPowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
BMW4 Series Gran Coupe (G26)420i	5,000-6,500 rpm	1,350-4,000 rpm	6,750 rpm
BMWX4 (G02 LCI)Facelift 202120i	5,000-6,500 rpm	1,350-4,000 rpm	6,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	BMW4 Series Gran Coupe (G26)420i	BMWX4 (G02 LCI)Facelift 202120i
	Acceleration checkpoints
0-60 mph 0-97 km/h	7.5 s	7.9 s
0-100 km/h 0-62 mph	7.9 s	8.4 s
0-200 km/h 0-124 mph	34.6 s	51.7 s
Top speed	235 km/h 146 mph	215 km/h 134 mph
	Drag race simulation
60 ft 18 m	2.6 s	2.5 s
330 ft 101 m	6.8 s	6.8 s
1/8 mile 201 m	10.3 s	10.4 s
1000 ft 305 m	13.2 s	13.5 s
1/4 mile 402 m	15.7 s	16.1 s
Trap speed 1/4 mile 402 m	147 km/h 91 mph	140 km/h 87 mph

Power comparison

Bar comparison chart for Power. Higher is better · hp / kW

Chart data table
Vehicle	Value
BMW4 Series Gran Coupe (G26)420i	184 hp 137 kW
BMWX4 (G02 LCI)Facelift 202120i	184 hp 137 kW

Torque comparison

Bar comparison chart for Torque. Higher is better · Nm / lb-ft

Chart data table
Vehicle	Value
BMW4 Series Gran Coupe (G26)420i	300 Nm 221 lb-ft
BMWX4 (G02 LCI)Facelift 202120i	300 Nm 221 lb-ft

Curb weight comparison

Bar comparison chart for Curb weight. Lower is better · kg / lb

Chart data table
Vehicle	Value
BMW4 Series Gran Coupe (G26)420i	1,620 kg 3,571 lb
BMWX4 (G02 LCI)Facelift 202120i	1,800 kg 3,968 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
Vehicle	Value
BMW4 Series Gran Coupe (G26)420i	235 km/h 146 mph
BMWX4 (G02 LCI)Facelift 202120i	215 km/h 134 mph

0-100 km/h comparison

Bar comparison chart for 0-100 km/h. Lower is better · seconds

Chart data table
Vehicle	Value
BMW4 Series Gran Coupe (G26)420i	7.9 s
BMWX4 (G02 LCI)Facelift 202120i	8.4 s

The biggest 0-100 km/h difference is between BMW 4 Series Gran Coupe (G26) 420i and BMW X4 (G02 LCI) Facelift 2021 20i: 0.5 s.

Fuel consumption comparison

Bar comparison chart for Fuel consumption. Lower is better · L/100 km / mpg US / mpg UK

Chart data table
Vehicle	Value
BMW4 Series Gran Coupe (G26)420i	7.3 L/100 km 32.2 mpg US 38.7 mpg UK
BMWX4 (G02 LCI)Facelift 202120i	8.4 L/100 km 28.0 mpg US 33.6 mpg UK

The biggest fuel consumption difference is between BMW 4 Series Gran Coupe (G26) 420i and BMW X4 (G02 LCI) Facelift 2021 20i: 1.1 L/100 km.

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
Vehicle	Value
BMW4 Series Gran Coupe (G26)420i	114 hp/t 85 kW/t 8.8 kg/hp
BMWX4 (G02 LCI)Facelift 202120i	102 hp/t 76 kW/t 9.8 kg/hp

Estimated range comparison

Bar comparison chart for Estimated range. Higher is better · km / mi

Chart data table
Vehicle	Value
BMW4 Series Gran Coupe (G26)420i	808 km 502 mi
BMWX4 (G02 LCI)Facelift 202120i	774 km 481 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
Vehicle	Power	Acceleration	Top speed
BMW4 Series Gran Coupe (G26)420i	184 hp 137 kW	7.9 s	235 km/h 146 mph
BMWX4 (G02 LCI)Facelift 202120i	184 hp 137 kW	8.4 s	215 km/h 134 mph

Most attractive quadrant

Scatter chart with performance score on the X axis and practicality score on the Y axis.

Vehicle

Performance score

Practicality score

BMW4 Series Gran Coupe (G26)420i

Power	184 hp 137 kW
0-100 km/h	7.9 s
Top speed 235 km/h 146 mph

Doors/seats	5 doors 5 seats
Trunk	470 L 16.6 cu ft
Length	4,783 mm 188.3 in
Height	1,442 mm 56.8 in

BMWX4 (G02 LCI)Facelift 202120i

Power	184 hp 137 kW
0-100 km/h	8.4 s
Top speed 215 km/h 134 mph

Doors/seats	5 doors 5 seats
Trunk	525 L 18.5 cu ft
Length	4,751 mm 187.0 in
Height	1,621 mm 63.8 in

Performance vs fuel economy

Cars closer to the top-right corner combine stronger performance with better fuel economy scores.

Vehicle

Performance score

Fuel economy score

BMW4 Series Gran Coupe (G26)420i

Power	184 hp 137 kW
0-100 km/h	7.9 s
Top speed 235 km/h 146 mph

7.3 L/100 km

32.2 mpg US

38.7 mpg UK

BMWX4 (G02 LCI)Facelift 202120i

Power	184 hp 137 kW
0-100 km/h	8.4 s
Top speed 215 km/h 134 mph

8.4 L/100 km

28.0 mpg US

33.6 mpg UK

BMW 4 Series Gran Coupe (G26) 420i is closest to the top-right balance target for performance and fuel economy.

Acceleration vs fuel consumption

Cars closer to the lower-left corner offer a better mix of quick acceleration and low fuel consumption.

Acceleration vs fuel consumption data table
Vehicle	Fuel consumption, L/100 km	0-100 km/h, s
BMW4 Series Gran Coupe (G26)420i	7.3 L/100 km 32.2 mpg US 38.7 mpg UK	7.9 s
BMWX4 (G02 LCI)Facelift 202120i	8.4 L/100 km 28.0 mpg US 33.6 mpg UK	8.4 s

Power-to-weight vs fuel consumption

The shaded area favors higher power-to-weight with lower combined fuel consumption.

Power-to-weight vs fuel consumption data table
Vehicle	Power-to-weight, hp/t	Fuel consumption, L/100 km
BMW4 Series Gran Coupe (G26)420i	114 hp/t 85 kW/t 8.8 kg/hp	7.3 L/100 km 32.2 mpg US 38.7 mpg UK
BMWX4 (G02 LCI)Facelift 202120i	102 hp/t 76 kW/t 9.8 kg/hp	8.4 L/100 km 28.0 mpg US 33.6 mpg UK

Detailed score breakdown

Vehicle

BMW4 Series Gran Coupe (G26)420i

BMWX4 (G02 LCI)Facelift 202120i

Power

184 hp

137 kW

184 hp

137 kW

Torque

300 Nm

221 lb-ft

300 Nm

221 lb-ft

Acceleration

7.9 s

8.4 s

Top speed

235 km/h

146 mph

215 km/h

134 mph

Lightness

1,620 kg

3,571 lb

1,800 kg

3,968 lb

Fuel consumption

7.3 L/100 km

32.2 mpg US

38.7 mpg UK

8.4 L/100 km

28.0 mpg US

33.6 mpg UK

Practicality

Doors/seats	5 doors 5 seats
Trunk	470 L 16.6 cu ft
Length	4,783 mm 188.3 in
Height	1,442 mm 56.8 in

Doors/seats	5 doors 5 seats
Trunk	525 L 18.5 cu ft
Length	4,751 mm 187.0 in
Height	1,621 mm 63.8 in

Range score

808 km

502 mi

774 km

481 mi

Trunk score

470 L

16.6 cu ft

525 L

18.5 cu ft

Power-to-weight score

114 hp/t

85 kW/t

8.8 kg/hp

102 hp/t

76 kW/t

9.8 kg/hp

Overall

Fixed score

Fuel cost and annual usage

Estimate running costs from combined consumption, your annual distance, and the fuel price in your local currency.

Average annual distanceDistance unitFuel price in your local currencyPrice unit

Enter the fuel price in your local currency, for example €/L, $/gal, £/L or any other local currency.

LC = Local Currency

Fuel cost and annual usage
Vehicle	BMW 4 Series Gran Coupe (G26) 420i	BMW X4 (G02 LCI) Facelift 2021 20i
Consumption	7.3 L/100 km32.2 mpg US38.7 mpg UK	8.4 L/100 km28 mpg US33.6 mpg UK
Cost / 100 km	12.78 LC100 km	14.70 LC100 km
Cost / 100 mi	20.56 LC100 mi	23.66 LC100 mi
Annual fuel used	1,095 L289 US gal241 UK gal	1,260 L333 US gal277 UK gal
Annual fuel cost	1,916 LC/year	2,205 LC/year